21 CFR § 556.240 - Estradiol and related esters.

(a) [Reserved]

(b) Residues. Residues of estradiol are not permitted in excess of the following increments above the concentrations of estradiol naturally present in untreated animals:

(1) Cattle.

(i) Muscle: 0.2 ppb.

(ii) Liver: 0.6 ppb.

(iii) Kidney: 1.2 ppb.

(iv) Fat: 1.2 ppb.

(2) [Reserved]

(c) Related conditions of use. See §§ 522.840, 522.850, 522.1940, 522.2343, 522.2477, and 522.2478 of this chapter.

[84 FR 32993, July 11, 2019, as amended at 87 FR 17947, Mar. 29, 2022]